feat: 🎸 add pathToLocation() utility

src/fsa-to-node/__tests__/util.test.ts

@@ -0,0 +1,27 @@
+import { pathToLocation } from '../util';
+
+describe('pathToLocation()', () => {
+  test('handles empty string', () => {
+    expect(pathToLocation('')).toStrictEqual([[], '']);
+  });
+
+  test('no path, just filename', () => {
+    expect(pathToLocation('scary.exe')).toStrictEqual([[], 'scary.exe']);
+  });
+
+  test('multiple steps in the path', () => {
+    expect(pathToLocation('/gg/wp/hf/gl.txt')).toStrictEqual([['gg', 'wp', 'hf'], 'gl.txt']);
+    expect(pathToLocation('gg/wp/hf/gl.txt')).toStrictEqual([['gg', 'wp', 'hf'], 'gl.txt']);
+    expect(pathToLocation('/wp/hf/gl.txt')).toStrictEqual([['wp', 'hf'], 'gl.txt']);
+    expect(pathToLocation('wp/hf/gl.txt')).toStrictEqual([['wp', 'hf'], 'gl.txt']);
+    expect(pathToLocation('/hf/gl.txt')).toStrictEqual([['hf'], 'gl.txt']);
+    expect(pathToLocation('hf/gl.txt')).toStrictEqual([['hf'], 'gl.txt']);
+    expect(pathToLocation('/gl.txt')).toStrictEqual([[], 'gl.txt']);
+    expect(pathToLocation('gl.txt')).toStrictEqual([[], 'gl.txt']);
+  });
+
+  test('handles double slashes', () => {
+    expect(pathToLocation('/gg/wp//hf/gl.txt')).toStrictEqual([['gg', 'wp', '', 'hf'], 'gl.txt']);
+    expect(pathToLocation('//gl.txt')).toStrictEqual([[''], 'gl.txt']);
+  });
+});

src/fsa-to-node/util.ts

@@ -0,0 +1,11 @@
+import {FsaToNodeConstants} from "./constants";
+import type {FsLocation} from "./types";
+
+export const pathToLocation = (path: string): FsLocation => {
+  if (path[0] === FsaToNodeConstants.Separator) path = path.slice(1);
+  const lastSlashIndex = path.lastIndexOf(FsaToNodeConstants.Separator);
+  if (lastSlashIndex === -1) return [[], path];
+  const file = path.slice(lastSlashIndex + 1);
+  const folder = path.slice(0, lastSlashIndex).split(FsaToNodeConstants.Separator);
+  return [folder, file];
+};